JP4680071B2 - Image processing device - Google Patents

Description

  The present invention relates to an image processing apparatus that performs resolution conversion processing and clipping processing on a digital image.

  In an image processing device such as a digital still camera, when displaying a part of a digital image recorded in a built-in memory or storage medium on a display device such as a liquid crystal, select the cutout position with the up / down / left / right direction keys, A method of selecting the zoom magnification with the enlargement key and the reduction key is common.

  FIG. 12 is a diagram illustrating a state in which a central portion of a digital image is enlarged in a conventional image processing apparatus. An original digital image is referred to as an original image 11, and an image size and an image position for performing extraction processing from the original image 11 according to the zoom magnification are referred to as a cut-out angle of view 12. When the direction key is operated from the state shown in FIG. 12, the cut-out view angle 12 moves in the original image 11, and when the enlargement key or the reduction key is operated, the size of the cut-out view angle 12 changes. When the size of the cut-out angle of view 12 changes, generally the size changes based on the center of the cut-out angle of view 12. A reference point for changing the size of the cut-out view angle 12 is referred to as a zoom center 13.

  FIG. 13 is a diagram showing a state in which zoom enlargement processing is performed with the enlargement key from the state of FIG. The cut-out view angle 12 is reduced in size after the zoom enlargement process, and changes to the cut-out view angle 14 after zoom enlargement in FIG. At this time, the zoom enlargement process is performed with reference to the zoom center 13, and therefore the position of the zoom center does not change before and after the zoom enlargement process.

  FIG. 14 is a diagram illustrating a state in which zoom enlargement processing is performed when the center of the original image 11 and the center of the cut-out angle of view do not match in the conventional image processing apparatus. In the example of FIG. 14, the cut-out angle of view 12 is in contact with the upper left end of the original image 11. The zoom center 13 at this time is generally the center of the cut-out angle of view 12. The angle of view after performing zoom enlargement processing from this state is the cut-out angle of view 14 after zoom enlargement. At this time, the zoom center 13 coincides before and after the zoom enlargement process.

  For example, in the image data display processing method described in Patent Document 1, the position coordinate on the display device is converted into the position coordinate of the image data storage unit in order to enlarge and display the image that the user wants to refer to. It is described.

  However, when the upper left corner of the original image 11 is displayed, if the zoom center 13 is at the center of the cutout angle of view 12 as described above, the upper left end of the original image 11 deviates from the cutout angle of view 14 after zooming in. Therefore, it is necessary to perform parallel movement processing on the cut-out view angle 14 after zooming.

JP-A-5-333847 (summary)

  Since the conventional image processing apparatus is configured as described above, there is a problem that the end portion in the image cannot be easily enlarged.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an image processing apparatus capable of easily enlarging an end portion in an image in image processing using both zoom and parallel movement processing.

Zoom the present invention an image processing apparatus according to the outputs and extraction position designation unit for outputting a position data cut out position extraction processing on the original image cutout processing is performed is performed, the zoom magnification data by the designated zoom magnification Based on the magnification designation unit, the cutout position data output by the cutout position designation unit, the zoom magnification data output by the zoom magnification designation unit, the input original image size data, and the held previous cutout view angle data A cut-out view angle calculation unit for calculating the next zoom magnification, the zoom center coordinate, the next cut-out view angle center coordinate, and the next cut-out view angle size as next cut-out view angle data, and the next cut-out image calculated by the cut-out view angle calculation unit Image cutout that performs cutout processing on the input original image data based on the corner data And a part, the cut angle calculation unit, the following cut angle data previously calculated in the cutout field angle calculator includes a holding portion for holding as the pre-cut angle data, the clipping processing is performed When the position is the upper left corner of the original image, the upper left corner of the original image is calculated as the zoom center coordinate, and when the position where the clipping process is performed is the lower right edge of the original image, The lower right corner of the original image is calculated as the zoom center coordinate .

  According to the present invention, in the image processing using both the zoom and the parallel movement processing, the effect that the end portion in the image can be easily enlarged with fewer steps than in the past can be obtained.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of an image processing apparatus according to Embodiment 1 of the present invention. The image processing apparatus includes a cutout position designation unit 1, a zoom magnification designation unit 2, a cutout view angle calculation unit 3, and an image cutout unit 4.

  The cut-out position designation unit 1 is composed of up / down / left / right direction keys and the like, and designates a position where cut-out processing is performed by the user operating the direction keys. The cut-out position specifying unit 1 outputs cut-out position data 101 to the cut-out view angle calculating unit 3. The cut-out position data 101 is represented by the number of steps in each direction, such as “one step upward”. In this manner, the cutout position designation unit 1 outputs the cutout position data 101 based on the designated position of the original image on which the cutout process is performed.

  The zoom magnification designation unit 2 is composed of an enlargement / reduction key and the like, and the user designates the zoom magnification by operating the enlargement / reduction key. Zoom magnification data 102 is output from the zoom magnification specification unit 2 to the cut-out view angle calculation unit 3. The zoom magnification data 102 is represented by the number of steps in each direction of enlargement / reduction, for example, “enlargement 1 step”. As described above, the zoom magnification specifying unit 2 outputs the zoom magnification data 102 with the specified zoom magnification.

  The cut-out view angle calculation unit 3 includes the cut-out position data 101 output by the cut-out position specifying unit 1, the zoom magnification data 102 output by the zoom magnification specifying unit 2, the input original image size data 103, and the pre-holding data. Based on the cut-out view angle data, the next zoom magnification, the zoom center coordinate, the next cut-out view angle center coordinate, and the next cut-out view angle size are calculated as the next cut-out view angle data 105 and output to the image cut-out unit 4.

  Here, the cut-out view angle calculation unit 3 calculates the next zoom magnification based on the previous zoom magnification and zoom magnification data 102 of the held previous cut-out view angle data, and the original image size data 103, the cut-out position data 101, and the zoom The zoom center coordinates are calculated based on the magnification data 102, and the next cut-out view angle center coordinates are calculated based on the zoom center coordinates, the previous cut-out view angle center coordinates of the held previous cut-out view angle data, the previous zoom magnification, and the next zoom magnification. Then, the next cut-out view angle size is calculated based on the previous zoom magnification, the next zoom magnification, and the previous cut-out view angle size of the held previous cut-out view angle data.

  The image cutout unit 4 performs cutout processing on the input image data 106 based on the next cutout view angle data 105 calculated by the cutout view angle calculation unit 3, and outputs cutout image data 107.

  FIG. 2 is a block diagram showing the configuration of the cut-out angle-of-view calculation unit 3 which is a main component of the first embodiment. The cut-out view-angle calculation unit 3 includes the cut-out view angle data holding unit 31 and the cut-out view angle data. A calculation unit 32 is provided.

  The cut-out view angle data holding unit 31 holds the previous cut-out view angle data 104 calculated by the cut-out view angle data calculating unit 32. The cut-out view angle data calculation unit 32 includes cut-out position data 101 output from the cut-out position specifying unit 1, zoom magnification data 102 output from the zoom magnification specifying unit 2, input original image size data 103, and cut-out view angle data. Based on the previous cut-out view angle data 104 held in the holding unit 31, a next zoom magnification, a zoom center coordinate, a next cut-out view angle center coordinate, and a next cut-out view angle size are calculated as the next cut-out view angle data 105. The calculated next cut-out view angle data 105 is held in the cut-out view angle data holding unit 31.

Next, the operation of the cut-out view angle calculation unit 3 will be described.
First, the configuration of each data will be described.
FIG. 3 is a diagram showing the contents of the original image size data 103. The original image size data 103 is represented by the number of horizontal pixels LX and the number of vertical lines LY of the original image 11 as shown in FIG.

  FIG. 4 is a diagram showing the contents of the cut-out view angle data. As shown in FIG. 4, the cut-out view angle data includes the number of cut-out view angle horizontal pixels (cut-out view angle size DX), the number of cut-out view angle vertical lines (cut-out view angle size DY), and the cut-out view angle center coordinates (CX, CY). , Zoom center coordinates (ZX, ZY) and zoom magnification (ZR). Further, the cutout position data 101 is represented by the number of steps in each direction as described above. The zoom magnification data 102 is represented by the number of steps in the enlargement direction or reduction direction as described above.

The cut-out angle-of-view calculation unit 3 first refers to the zoom magnification data 102 and holds it in the cut-out angle-of-view data holding unit 31 according to equation (1) if it is the enlargement direction and according to equation (2) if it is the reduction direction. The next zoom magnification ZR1 is calculated from the previous zoom magnification ZR0. STEP in the equations (1) and (2) is the number of steps of the zoom magnification data 102, and ZUNIT is a predetermined zoom magnification increment set in advance.
ZR1 = ZR0 + STEP × ZUNIT (1)
ZR1 = ZR0−STEP × ZUNIT (2)

  Next, a method for calculating the zoom center coordinates (ZX, ZY), which is also a feature of the present embodiment, will be described. In the conventional method, the zoom center coordinates (ZX, ZY) coincide with the cut-out view angle center coordinates (CX, CY), but in the first embodiment, the zoom center coordinates (ZX, ZY) and the cut-out view angle center coordinates The feature is that (CX, CY) is different.

The cut-out angle-of-view calculation unit 3 shows an example of an expression for calculating the zoom center coordinates (ZX, ZY) using the linear interpolation method according to the following expressions (3) and (4).
ZX = LX × CX ÷ (LX−DX) −LX × DX ÷ 2 ÷ (LX−DX) (3)
ZY = LY × CY ÷ (LY−DY) −LY × DY ÷ 2 ÷ (LY-DY) (4)
Here, the number of horizontal pixels LX and the number of vertical lines LY of the original image 11 are given as the original image size data 103, and the cut-out view angle center coordinates (CX, CY) are given as the cut-out position data 101 from the cut-out position specifying unit 1. The number of cut-out view angle horizontal pixels (DX) and the number of cut-out view angle vertical lines (DY) are given as zoom magnification data 102 from the zoom magnification designating unit 102.

  FIG. 5 is a diagram illustrating a state in which the cut-out angle of view 12 is in the center of the original image 11. According to the above formulas (3) and (4), when the cut-out view angle 12 is at the center of the original image 11, the cut-out view angle center coordinates (CX, CY) are CX = LX ÷ 2, CY = LY ÷. 2, the zoom center coordinates (ZX, ZY) are ZX = LX ÷ 2, ZY = LY / 2, and the cut-out view angle center coordinates (CX, CY) and the next zoom center coordinates (ZX, ZY) as shown in FIG. ) Matches.

  FIG. 6 is a diagram illustrating a state in which the cut-out angle of view 12 is at the upper left corner of the original image 11. According to the above formulas (3) and (4), when the cut-out view angle 12 is at the upper left corner of the original image 11, the cut-out view angle center coordinates (CX, CY) are CX = DX ÷ 2, CY = DY ÷ 2, the zoom center coordinates (ZX, ZY) are ZX = 0 and ZY = 0, and the zoom center coordinates are the upper left corner of the cut-out angle of view 12 as shown in FIG.

  FIG. 7 is a diagram showing a state in which the cut-out angle of view 12 is at the lower right corner of the original image 11. According to the above formulas (3) and (4), when the cut-out view angle 12 is at the lower right end of the original image 11, the cut-out view angle center coordinates (CX, CY) are CX = LX−DX ÷ 2, CY = LY-DY / 2, the zoom center coordinates (ZX, ZY) are ZX = LX, ZY = LY, and the zoom center coordinates are the lower right corner of the cut-out angle of view 12 as shown in FIG.

The zoom center coordinates when the cut-out view angle is at the center of the original image are as shown in FIG. 5, and the zoom center coordinates when the cut-out view angle is at the upper left corner of the original image are as shown in FIG. The center coordinates when the cut-out angle of view is at the lower right corner of the original image are as shown in FIG. 7, and the zoom center coordinates change linearly between FIG. 5, FIG. 6 and FIG. When the relationship is obtained, the above equations (3) and (4) can be obtained.
The feature of the first embodiment is that the zoom center coordinates (ZX, ZY) move within the cut-out view angle 12 according to the value of the cut-out view angle center coordinates (CX, CY) as described above.

Next, based on the calculated next zoom center coordinates (ZX, ZY), the previous clip angle of view center coordinates (CX0, CY0), the previous zoom magnification ZR0, and the next zoom magnification ZR1, the cutout angle of view calculation unit 3 The coordinates (CX1, CY1) are calculated. The calculation formula is as shown in Formula (5) and Formula (6).
CX1 = (CX0−ZX) × ZR0 ÷ ZR1 + ZX (5)
CY1 = (CY0−ZY) × ZR0 ÷ ZR1 + ZY (6)

Here, how to obtain the above equations (5) and (6) will be described.
The cut-out view angle center coordinates (CX0, CY0) in a certain frame are expressed by the following equations (7) and (8).
CX0 = (CX0−ZX) + ZX (7)
CY0 = (CY0−ZY) + ZY (8)
Further, the next cut-out view angle center coordinates (CX1, CY1) in the next frame in which the zoom magnification is changed are expressed by the following equations (9) and (10).
CX1 = (CX1-ZX1) + ZX1 (9)
CY1 = (CY1-ZY1) + ZY1 (10)
Since the zoom center coordinates (ZX, ZY) are not changed by changing the zoom magnification, assuming that the zoom magnification in a certain frame is ZR0 and the next zoom magnification in the next frame is ZR1, the following equations (11) and (12) are obtained. It holds.
(CX1-ZX) * ZR1 = (CX0-ZX) * ZR0 (11)
(CY1-ZY) * ZR1 = (CY0-ZY) * ZR0 (12)
The said Formula (5) and Formula (6) are obtained by the said Formula (11) and Formula (12).

Finally, the cut-out view angle calculation unit 3 calculates the next cut-out view angle size (DX1, DY1) from the previous zoom magnification ZR0, the next zoom magnification ZR1, and the previous cut-out view angle size (DX0, DY0). 14). Thus, the next cut-out view angle data 105 is calculated.
DX1 = DX0 × ZR0 ÷ ZR1 (13)
DY1 = DY0 × ZR0 ÷ ZR1 (14)

Here, how to obtain the above equations (13) and (14) will be described.
The previous crop angle of view in the previous frame is (DX0, DY0), the next crop angle of view in the next frame with the zoom magnification changed is (DX1, DY1), the zoom magnification in the previous frame is ZR0, and the next zoom in the next frame When the magnification is ZR1, the following equations (15) and (16) are established.
DX1 × ZR1 = DX0 × ZR0 (15)
DY1 × ZR1 = DY0 × ZR0 (16)
The above formulas (13) and (14) are calculated by the above formulas (15) and (16).

  In this way, the cut-out angle-of-view calculation unit 3 calculates the next zoom magnification ZR1 by the above formulas (1) and (2), and the zoom center coordinates (ZX, ZY by the above formulas (3) and (4). ), The next cut-out view angle center coordinates (CX1, CY1) are calculated from the above formulas (5) and (6), and the next cut-out view angle sizes (DX1, DX1) are calculated from the above formulas (13) and (14). DY1) and the calculated next zoom magnification ZR1, the zoom center coordinates (ZX, ZY), the next cut-out view angle center coordinates (CX1, CY1), and the next cut-out view angle size (DX1, DY1) The data 105 is output to the image cutout unit 4.

  The image cutout unit 4 performs cutout processing on the input image data 106 based on the next cutout view angle data 105 calculated by the cutout view angle calculation unit 3, and outputs cutout image data 107. .

  As described above, according to the first embodiment, the cut-out view angle calculation unit 3 performs the next zoom magnification based on the cut-out position data 101, the zoom magnification data 102, the original image size data 103, and the previous cut-out view angle data 104. ZR1, zoom center coordinates (ZX, ZY), next cut-out view angle center coordinates (CX1, CY1) and next cut-out view angle size (DX1, DY1) are calculated as next cut-out view angle data 105, and zoom center coordinates (ZX, By setting ZY) to a position different from the next cut-out view angle center coordinates (CX1, CY1), the image edge does not deviate from the view angle even after zoom enlargement. An effect is obtained that the end portion in the image can be easily enlarged with less effort.

  According to the first embodiment, in the examples shown in the above formulas (3) and (4), the next zoom center coordinates (ZX1, ZY1) are set with respect to the previous cut-out view angle center coordinates (CX0, CY0). Although it is changed linearly by using a linear interpolation method, it may be changed nonlinearly by using an arbitrary function.

Embodiment 2. FIG.
FIG. 8 is a block diagram showing a configuration of an image processing apparatus according to Embodiment 2 of the present invention. This image processing apparatus includes a cutout position designation unit 1, a zoom magnification designation unit 2, an image cutout unit 4, a zoom center position designation unit 5, a relative field angle center position calculation unit 6, a designated data holding unit 7, and a relative zoom center position calculation. A section 8 and a cut-out view angle calculation section 9 are provided.

  The cutout position designation unit 1, zoom magnification designation unit 2, and image cutout unit 4 have the same functions as the cutout position designation unit 1, zoom magnification designation unit 2, and image cutout unit 4 shown in FIG. 1 of the first embodiment. is doing.

  The zoom center position designation unit 5 is composed of up / down / left / right direction keys and the like, and the user operates the direction keys to directly specify the zoom center position within the angle of view. That is, the zoom center position that is directly specified within the cut-out angle of view is specified by moving the cursor or the like with the up / down / left / right direction keys on the image of the cut-out angle of view displayed on the display unit (not shown). Is done.

  FIG. 9 is a diagram illustrating the zoom center position. The zoom center position data 111 is represented by relative coordinates from the center position of the cut-out angle of view 12 as shown in FIG. For example, when the zoom center position is designated as the center position of the cropping angle of view 12, the zoom center position data 111 is (0.0, 0.0), and the zoom center position is the upper left corner of the cropping angle of view 12. If the zoom center position data 111 is specified as (−1.0, −1.0), and the zoom center position is specified as the lower right corner of the cut-out angle of view 12, the zoom center position data is specified. The data 111 becomes (1.0, 1.0).

  In this way, the zoom center position designation unit 5 inputs the zoom center position designated within the cut-out angle of view from the user, and relatively determines which position in the cut-out angle of view the designated zoom center position is. The zoom center position data 111 shown, that is, the zoom center position data 111 indicating the zoom center position as a relative coordinate from the center position of the angle of view is output to the designated data holding unit 7.

  The relative view angle center position calculation unit 6 is based on the input original image size data 103 and the previous cut view angle center coordinates and the previous cut view angle size of the previous cut view angle data calculated by the cut view angle calculation unit 9. Relative angle-of-view center position data 112 relatively indicating where the cut-out angle of view is in the original image is calculated.

  FIG. 10 is a diagram for explaining the relative field angle center position. The relative angle-of-view center position data 112 is represented by relative coordinates from the center position in the original image 11 as shown in FIG. For example, when the cut-out view angle 12 is at the center position of the original image 11, the relative view angle center position data 112 is (0.0, 0.0), and the cut-out view angle 12 is the upper left corner of the original image 11. In this case, the relative angle-of-view center position data 112 is (−1.0, −1.0), and when the cut-out angle of view 12 is the lower right corner of the original image 11, the relative angle-of-view center position data 112. Becomes (1.0, 1.0).

  As described above, the relative angle-of-view center position calculation unit 6 calculates the input original image size data 103 and the previous cut-out view angle center coordinates and the previous cut-out view angle of the previous cut-out view angle data calculated by the cut-out view angle calculation unit 9. Relative angle-of-view center position data 112 indicating the relative position of the cut-out angle of view in the original image based on the size, that is, a relative image indicating the cut-out angle of view in relative coordinates from the center position of the original image. The corner center position data 112 is calculated and output to the designated data holding unit 7 and the cut-out view angle calculating unit 9.

  The designation data holding unit 7 holds the zoom center position data 111 output from the zoom center position designation unit 5 and the relative field angle center position data 112 output from the relative field angle center position calculation unit 6. The zoom center position holding data 113 and the relative angle-of-view center position holding data 114 held in the above are output to the relative zoom center position calculation unit 8. The zoom center position holding data 113 is updated only when the zoom center position is designated from the user to the zoom center position designation unit 5.

  The relative zoom center position calculation unit 8 has the zoom center position specified by the zoom center position specifying unit 5 based on the zoom center position holding data 113 and the relative view angle center position holding data 114 output from the specified data holding unit 7. Relative zoom center position data 115 indicating the ratio between the zoom center position and the relative view angle center position at the time is calculated. The calculated relative zoom center position data 115 is output to the cut-out view angle calculation unit 9 and used for calculation of the cut-out view angle.

  The cut-out view angle calculation unit 9 includes the input original image size data 103, the cut-out position data 101 output from the cut-out position specification unit 1, the zoom magnification data 102 output from the zoom magnification specification unit 2, and the relative view angle center position Based on the relative view angle center position data 112 output from the calculation unit 6 and the relative zoom center position data 115 output from the relative zoom center position calculation unit 8, the next cut-out view angle data 105 is calculated and the image cut-out unit 4 and The relative angle of view center calculation unit 6 outputs the result.

  Here, the cut-out angle-of-view calculation unit 9 is output by the previous zoom magnification and zoom-magnification specifying unit 2 of the previous cut-out angle-of-view data held as in the cut-out view angle calculation unit 3 of the first embodiment. The next zoom magnification is calculated based on the zoom magnification data 102, and the next cut-out view angle size is calculated based on the previous zoom magnification, the next zoom magnification, and the previous cut-out view angle size of the held previous cut-out view angle data.

  The cut-out view angle calculation unit 9 holds the relative view angle center position data 112 output from the relative view angle center position calculation unit 6 and the relative zoom center position data 115 output from the relative zoom center position calculation unit 8. The zoom center coordinates are calculated based on the previous cut-out view angle center coordinates of the previous cut-out view angle data and the calculated next cut-out view angle size, and the calculated zoom is the same as the cut-out view angle calculation unit 3 of the first embodiment. The next cut-out view angle center coordinates are calculated based on the center coordinates, the previous cut-out view angle center coordinates of the held previous cut-out view angle data, the previous zoom magnification, and the calculated next zoom magnification.

  Similar to the image cutout unit 4 of the first embodiment, the image cutout unit 4 cuts out the input image data 106 based on the next cutout view angle data 105 output from the cutout view angle calculation unit 9. And the cut out image data 107 is output.

  FIG. 11 is a block diagram showing the configuration of the cut-out view angle calculation unit 9 which is a main component of the second embodiment. The cut-out view angle calculation unit 9 includes a cut-out view angle data holding unit 91 and cut-out view angle data. A calculation unit 92 is provided.

  The cut-out view angle data holding unit 91 holds the previous cut-out view angle data 104 calculated by the cut-out view angle data calculating unit 92. The cut-out view angle data calculation unit 92 includes cut-out position data 101 output from the cut-out position specifying unit 1, zoom magnification data 102 output from the zoom magnification specifying unit 2, input original image size data 103, and cut-out view angle data. Pre-cut view angle data 104 held in the holding unit 91, relative view angle center position data 112 output by the relative view angle center position calculation unit 6, and relative zoom center position output by the relative zoom center position calculation unit 8 Based on the data 115, the next zoom magnification, the next cut-out view angle size, the zoom center coordinate, and the next cut-out view angle center coordinate are calculated as the next cut-out view angle data 105. The calculated next cut-out view angle data 105 is held in the cut-out view angle data holding unit 91.

Next, operations of the relative zoom center position calculation unit 8 and the cut-out angle-of-view calculation unit 9 which are main components of the second embodiment will be described.
First, the configuration of each data will be described.
The configuration of the cut-out view angle data is the same as that shown in FIG. 4 of the first embodiment, and the cut-out view angle data includes the number of cut-out view angle horizontal pixels (cut-out view angle size DX) and the number of cut-out view angle vertical lines. (Cut-out angle of view size DY), cut-out view angle center coordinates (CX, CY), zoom center coordinates (ZX, ZY), and zoom magnification (ZR).
Further, the cutout position data 101 is represented by the number of steps in each direction as described above, the zoom magnification data 102 is represented by the number of steps in the enlargement direction or the reduction direction as described above, and the original image data 103 is the horizontal of the original image. It can be expressed by the number of pixels (LX) and the number of vertical lines (LY).

The relative zoom center position calculation unit 8 performs relative processing according to the following expressions (17) and (18) based on the zoom center position holding data 113 (GX, GY) and the relative field angle center position holding data 114 (FX, FY). Zoom center position data 115 (EX, EY) is calculated.
EX = GX ÷ FX (however, when FX = 0, EX = 1) (17)
EY = GY ÷ FY (However, when FY = 0, EY = 1) (18)

  The cut-out angle-of-view calculation unit 9 is similar to the cut-out angle-of-view calculation unit 3 of the first embodiment, and the zoom magnification data output by the previous zoom magnification of the previous cut-out view angle data and the zoom magnification specifying unit 2 102, the next zoom magnification is calculated according to the above formulas (1) and (2), the previous zoom magnification of the previous cut-out view angle data held, the calculated next zoom magnification, and the held previous cut-out view angle Based on the previous cut-out view angle size of the data, the next cut-out view angle size is calculated according to the above formulas (13) and (14).

Further, the cut-out view angle calculation unit 9 includes the relative view angle center position data 112 (FX, FY) (= relative view angle center position holding data 114 (FX, FY)) and the relative zoom center position data 115 (EX, EY). Based on the previous cut-out view angle center coordinates (CX, CY) of the held previous cut-out view angle data and the calculated next cut-out view angle size (DX, DY), according to the following equations (19) and (20): The zoom center coordinates (ZX, ZY) are calculated.
ZX = CX + FX × EX × DX ÷ 2 (19)
ZY = CY + FY × EY × DY ÷ 2 (20)

  As described above, the cut-out view angle calculation unit 9 calculates the relative view angle center position data 112 (FX, FY) to the half of the previous cut-out view angle center coordinates (CX, CY) and the next cut-out view angle size (DX, DY). Then, the zoom center coordinates (ZX, ZY) are calculated by adding the values specified by the relative zoom center position data 115 (EX, EY) multiplied by the ratio.

  Further, the cut-out view angle calculation unit 9 holds the calculated zoom center coordinates, the previous cut-out view angle center coordinates of the held previous cut-out view angle data, and holds the same as the cut-out view angle calculation unit 3 of the first embodiment. Based on the previous zoom magnification and the calculated next zoom magnification of the previous cut-out view angle data, the next cut-out view angle center coordinates are calculated according to the above formulas (5) and (6).

  As shown in Expression (19) and Expression (20), the zoom center coordinates (ZX, ZY) are linked to the relative field angle center position data 112 (FX, FY) and the relative zoom center position data 115 (EX, EY). Change. Since the relative angle-of-view center position data 112 (FX, FY) is a value linked to the current cut-out view angle, the zoom center coordinates (ZX, ZY) move in conjunction with the current cut-out view angle.

  Since the relative zoom center position data 115 (EX, EY) is a value determined by the user-specified zoom center position, the zoom center coordinates (ZX, ZY) move according to the user-specified zoom center position. In other words, the movement amount of the zoom center coordinates (ZX, ZY) can be designated by user designation, and it is possible to easily obtain the user's desired cropping angle of view at a certain zoom magnification. This is a feature of the second embodiment. Since the zoom center position is once specified by the user, it is held until it is specified again. Therefore, the movement amount of the zoom center coordinates (ZX, ZY) changes at the same rate until it is specified again.

  As described above, according to the second embodiment, the same effects as in the first embodiment can be obtained, and the zoom center coordinates (ZX, ZY) can be changed in conjunction with the zoom center position designated by the user. As a result, the zoom center movement amount linked to the cut-out view angle position can be specified as desired by the user.

It is a block diagram which shows the structure of the image processing apparatus by Embodiment 1 of this invention. It is a block diagram which shows the structure of the cut-out view angle | corner calculation part of the image processing apparatus by Embodiment 1 of this invention. It is a figure which shows the content of the original image size data in the image processing apparatus by Embodiment 1 of this invention. It is a figure which shows the content of the cut-out view angle data in the image processing apparatus by Embodiment 1 of this invention. It is a figure which shows the state which has the cut-out view angle in the center of an original image in the image processing apparatus by Embodiment 1 of this invention. It is a figure which shows the state which has the cut-out view angle in the upper left end of an original image in the image processing apparatus by Embodiment 1 of this invention. It is a figure which shows the state which has a cut-out view angle in the lower right end of an original image in the image processing apparatus by Embodiment 1 of this invention. It is a block diagram which shows the structure of the image processing apparatus by Embodiment 2 of this invention. It is a figure explaining the zoom center position in the image processing device by Embodiment 2 of this invention. It is a figure explaining the relative field angle center position in the image processing apparatus by Embodiment 2 of this invention. It is a block diagram which shows the structure of the cut-out view angle calculation part of the image processing apparatus by Embodiment 2 of this invention. It is a figure which shows a mode in the case of enlarging the center part of a digital image in the conventional image processing apparatus. It is a figure which shows the state which implemented the zoom expansion process with the expansion key from the state of FIG. It is a figure which shows the state which performed the zoom expansion process in case the center of an original image and the center of a cut-out view angle do not correspond in the conventional image processing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutout position designation | designated part, 2 Zoom magnification designation part, 3 Cutout view angle calculation part, 4 Image cutout part, 5 Zoom center position designation part, 6 Relative view angle center position calculation part, 7 Designation data holding part, 8 Relative zoom center Position calculation unit, 9 cut-out view angle calculation unit, 11 original image, 12 cut-out view angle, 13 zoom center, 14 zoom-out cut-out view angle, 31 cut-out view angle data holding unit, 32 cut-out view angle data calculation unit, 101 cut-out Position data, 91 cut-out view angle data holding unit, 92 cut-out view angle data calculation unit, 101 cut-out view angle data, 102 zoom magnification data, 103 original image size data, 104 previous cut-out view angle data, 105th cut-out view angle data, 106 Image data, 107 image data, 111 zoom center position data, 112 relative field angle center position data 113 zoom center position holding data, 114 relative angle center position holding data, 115 relative zoom center position data.

Claims (4)

A cutout position designation unit cutout process on the original image cutout processing is performed is outputted as position data cutting position to be performed,
A zoom magnification specifying section for outputting zoom magnification data at a specified zoom magnification;
Based on the cutout position data output by the cutout position specifying unit, the zoom magnification data output by the zoom magnification specifying unit, the input original image size data, and the previous cutout view angle data held, the next zoom magnification, A cut-out view angle calculation unit that calculates the zoom-out center coordinates, the next cut-out view angle center coordinates, and the next cut-out view angle size as next cut-out view angle data;
An image cutout unit that performs a cutout process on the image data of the input original image based on the next cutout view angle data calculated by the cutout view angle calculation unit ;
The cut-out angle of view calculation unit
A holding unit for holding the next cut-out view angle data previously calculated in the cut-out view angle calculation unit as the previous cut-out view angle data;
When the position where the clipping process is performed is the upper left corner of the original image, the upper left corner of the original image is calculated as the zoom center coordinate, and the position where the clipping process is performed is the lower right edge of the original image. In some cases, the lower right corner of the original image is calculated as the zoom center coordinate.
An image processing apparatus. The cut-out angle of view calculation unit
Calculate the next zoom magnification based on the previous zoom magnification and the zoom magnification data of the previous cut-out view angle data that is held,
Calculate zoom center coordinates based on the original image size data, the cutout position data, and the zoom magnification data,
Based on the zoom center coordinates, the previous cut-out view angle center coordinates of the held previous cut-out view angle data, the previous zoom magnification and the next zoom magnification, the next cut-out view angle center coordinates are calculated,
The image processing apparatus according to claim 1, wherein the next cut-out angle of view is calculated based on the previous zoom magnification, the next zoom magnification, and the previous cut-out angle of view of the held previous cut-out angle of view data.   3. The image processing according to claim 2, wherein the cut-out angle-of-view calculation unit calculates a zoom center coordinate using a linear interpolation method based on the original image size data, the cut-out position data, and the zoom magnification data. apparatus.   3. The image processing according to claim 2, wherein the cut-out angle-of-view calculation unit calculates zoom center coordinates using an arbitrary function based on the original image size data, the cut-out position data, and the zoom magnification data. apparatus.

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